Awesome Personnel Carrier: While the Arbites utilise all the standard patterns of transport vehicles used by Imperial forces, such as Chimeras and Rhinos, they are also one of only two organisations with access to the Repressor pattern Rhino transport note the other being the Adepta Sororitas as they have found the extended transport bay, fire points on each flank and dozer blade ideal for dealing with riots and forming impromptu blockades.

Adeptus Arbites forces and characters have however made limited appearances in spin-off games, such as Inquisitor and Necromunda, and the Shira Calpurnia novels have the titular Arbitrator Senioris as their main character.

Various unofficial army lists have been released over the years and some units equipped with carapace armour and shotguns, such as Astra Militarum Veterans and Inquisitorial Acolytes, have been used as count-as Adeptus Arbites models but for the most part they are almost never seen in the core Warhammer 40,000 game itself despite being relatively well represented in the background material. The Adeptus Arbites have never had an officially published codex book, only unit information and models to be used as allies for other Imperial forces in early editions of the game. While local crime is the responsibility of planetary law enforcement, many of these local organisations are trained and equipped in imitation of the Adeptus Arbites, leading to some Imperial citizens mistaking them for true Arbitrators. If it goes so far that a planet goes into full rebellion, the Arbites are the ones expected to be a loyalist holdout, sealing their precinct houses for siege and getting the message out to the wider Imperium. When rabble-rousing citizens get in the way of the Imperial tithe being fulfilled, the Arbites are summoned to break them up and suppress riots. Most Imperial worlds will have at least one Arbites precinct house, with more important worlds having several such institutions located at strategic locations. The Adeptus Arbites are the enforcement arm of the Adeptus Terra, and it is their duty to track crimes that span multiple planets or systems, ensure that a world follows Administratum decrees and meets the Imperial Tithe, and provide a visible reminder of the might of Imperial law. To pursue and punish those who trespassed against His word.

To carry the Emperor's law to all worlds under His blessed protection. To judge and stand guard over His subjects.

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